Generate QR code-Swift

First import the Avfoundation framework

@IBOutlet weak var iconview:uiimageview!

Override Func Viewdidload () {

Super.viewdidload ()

Createqrcode ()

}

Private Func Createqrcode () {

Create a filter

Let Qrfilter = Cifilter (name: "Ciqrcodegenerator")

Reset the initial value of the filter

Qrfilter.setdefaults ()

To set the contents of a filter via KVC

Qrfilter.setvalue ("Deceased water peak". Datausingencoding (Nsutf8stringencoding, Allowlossyconversion:true), ForKey: " InputMessage ")

Output image

Let Ciimage = Qrfilter.outputimage

Print the size of the generated picture

println (Ciimage.extent ())

Filters for filtering image single color and deformation

Let Colorfilter = Cifilter (name: "Cifalsecolor")

Colorfilter.setdefaults ()

Colorfilter.setvalue (Ciimage, Forkey: "Inputimage")

Front view

Colorfilter.setvalue (Cicolor (red:0, green:0, blue:0), Forkey: "InputColor0")

Background color

Colorfilter.setvalue (Cicolor (red:1, Green:1, blue:1), Forkey: "InputColor1")

Let transform = Cgaffinetransformmakescale (5, 5)

Let Transformimage = ColorFilter.outputImage.imageByApplyingTransform (transform)

Let Codeimage = UIImage (ciimage:transformimage)

Let Avatarimage = UIImage (named: "Avatar")

println (Codeimage)

println ("----" + "\ (avatarimage)")

Iconview.image = UIImage (ciimage:transformimage)

Iconview.image = Insertavaterimage (codeimage!, avatarimage:avatarimage!)

}

Synthetic avatar Image

Private func Insertavaterimage (codeimage:uiimage,avatarimage:uiimage), UIImage {

Let size = Codeimage.size

1. Turn on the image context

Uigraphicsbeginimagecontext (size)

2. Drawing two-dimensional code image

Codeimage.drawinrect (CGRectMake (0, 0, size.width, size.height))

3. Calculate the size of the avatar

Let w = size.width * 0.25

Let H = size.height * 0.25

Let x = (size.width-w) * 0.5

Let y = (size.height-h) * 0.5

Avatarimage.drawinrect (CGRectMake (x, Y, W, h))

4. Remove the image from the context

Let image = Uigraphicsgetimagefromcurrentimagecontext ()

5. Close the context

Uigraphicsendimagecontext ()

return image

}

Generate QR code-Swift